Tejada, who did not play in the majors last season, twice tested positive this season for amphetamines. Under baseball's joint drug program, he was handed 25- and 80-game suspensions for second and third violations of amphetamines use.

[Update, 4 p.m.: The Associated Press and Yahoo! Sports are reporing that sources have said that Tejada tested positive for Adderall, a substance used to treat attention-deficit disorder.]

In a statement released by the MLB Players' Assn., Tejada said:

"I apologize to my teammates, the Royals organization and to the Kansas City fans. I have a medical condition that requires medication to treat. I took that medication while reapplying for a therapeutic use exemption. Under the requirements of the Joint Drug Program, I made a mistake in doing so."

Tejada, a six-time All-Star and the 2002 American League MVP, is currently on the disabled list with a calf injury. He played in 53 games this season, batting .278 with three home runs and 20 runs batted in.

The 39-year-old Dominican, who was often linked to steroid use -- drawing a mention in the Mitchell Report -- but never admitted to using them, has played 16 seasons in the majors. He's hit .285 in his career with 307 home runs and 1,203 RBIs.